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Finding the Fourth Proportional to 19,270.66, 28,882.98 and 9,915.16

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Solution

The fourth proportional to 19,270.66, 28,882.98 and 9,915.16 is: 14,860.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,270.66 : 28,882.98 = 9,915.16 : x
  2. Step 2: Convert to fraction form
    19,270.66/28,882.98 = 9,915.16/x
  3. Step 3: Cross multiply
    19,270.66x = 28,882.98 × 9,915.16
  4. Step 4: Simplify right side
    19,270.66x = 286,379,349.92
  5. Step 5: Solve for x
    x = 286,379,349.92/19,270.66
  6. Step 6: Final answer
    x = 14,860.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.